In an idyllic Welsh tourist town, a local family struggles with dark secrets amid the cheerful summer festivities . . .
 
Pendragon Island is the perfect place for summer holidays, with a stretch of clean golden sand and plenty of amusements nearby. Yet for one local family, the happy atmosphere risks becoming a cruel joke, as the unusually named Lewis Lewis’s affair with close friend Nia Martin threatens to tear his marriage apart.
The irritation of Lewis’s wife, Dora, is channeled towards their daughter, Rhiannon, who works at Nia’s sweet shop, Temptations. With his family at war and the gossip beginning to spread, it can only be a matter of time before Lewis’s misadventures catch up with him . . .